Question

I need help please and thank you

Answer 1

`(1)/(25)`

Explanation:

There are 10 marbles in total, 2 of them are yellow.

The probability that the first marble drawn is yellow is

`\frac{\text{Number of yellow marbles}}{\text{Total number of marbles}}=(2)/(10)=(1)/(5)`

The first marble is placed back, then

The probability that the second marble drawn is yellow is

`\frac{\text{Number of yellow marbles}}{\text{Total number of marbles}}=(2)/(10)=(1)/(5)`

Multiply the probabilities:

`(1)/(5)* (1)/(5)=(1)/(25)`